Spring structure



y 3 E. w. SCHLAPPRITZI 1,968,315

7 SPRING STRUCTURE Filed Oct. 10, 1932 Patented July 31, 1934 UNITED STATES PATENT OFFICE SPRING STRUCTURE Edward W. Schlappritzi Minneapolis, Minn.

Application October 10, 1932, Serial No. 637,169

7 Claims. (01. 155-179) lO ture' embodying my invention;

Figure 2 is a side elevation thereof; Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4 is a section on the line 44 of Figure 1;

Figures 5, 6 and 7 are top plan ,views of modifled forms of my spring structure;

, Figure 8 is a side elevation of Figure 7.

Referring now to Figures 1 and-2 of 'the drawing wherein one embodiment of my invention is illustrated, A is the base; B are vertically disposed leaf springs on the base; C are tie memvbers upon the leaf springs; D is a sectional rein- .forcing' strap; E are leaf springs projecting from 25. the tie members, and F is a transversely extending wire member at the outer ends of the leaf springs E and having rearwardly extending arm portions G and H respectively at opposite sides of the structure. -As shown, the base A is formed from bar stock-and comprises a pair of laterally spaced longitudinally extending members 1 and 2 and a pair of transversely extending members 3 and 4, the latter being riveted to the longitudinal members 1 and 2 at opposite ends thereof. The leaf springs B are substantially c-shape in configuration and extend upwardly from the transversely extending members 3 and 4 at spaced points thereof. Preferably these springs B open inwardly and have their lower ends riveted to the members 3 and 4. The tie members C are preferably cut from rolled steel and are arranged in pairs on the leaf springs B. As shown, the tie members C are terminally secured to the upper ends of the springs B and are provided at their forward ends with relatively short extensions 5.

'50 the leaf springs B. Preferably these springs have upwardly curved free ends 6 which are secured to clips '7 sleeved upon the transversely extending wire member F. The arms G and H respectively of the wire member are substantially parallel to the tie members 8 and 9 respectively at opposite sides of the structure and are fastened thereto and to the leaf springs B at opposite ends of the member 3 by suitable rivets 10.

If desired the rear ends 11 and 12 respectively of the arms G and H may be turned inwardly as shown so as to be out of the way. The reinforcing strap D for the tie members preferably comprises three sections 13, 14 and 15 respectively, the intermediate section 14 extending under all of the tie members except those designated 8 and 9 respectively at opposite sides of the structure, and the end'sections 13 and 15 respectively extending under opposite ends of the intermediate section 14 and under the tie members 8 and 9. Preferably elongated clips 16 are employed for securing the intermediate section 14 to the intermediate tie members, while rivets 1'7 are used to secure the end sections 13 and 15 to the intermediate section 14 and tie members.

As shown, two clips are used and each preferably comprises a strip 20 of sheet metal that extends longitudinally of the intermediate section 14 and has raised portions 21 receiving the tie members C. Tongues 22 project from oppositelongitudinal edges of the strip and are turned under the 30 intermediate section 14 of the band upon opposite sides of the tie members.

Thus from the foregoing it will be apparent that I have provided an extremely sturdy and efficient spring structure wherein the parts are 35 so constructed and arranged that (1) the wire member F forming the forward edge is given more resiliency; (2) the upward turn of the leaf springs E prevent the wire member F from sagging toward the base A; (3) only one clip is needed as a tie between each leaf spring E and the wire member F; (4) the intermediate section 14 of the reinforcing band is given greater swinging movement; and (5) clicking" of said section 14 at the ends thereof is obviated. More-' over, due to the construction and arrangement of the tie members C, leaf springs E and wire member F, the structure may have a straight front edge, as illustrated in Figure 1, or may have curved front edges, as illustrated in Figures 5 and 6 respectively. The tie members C may also have extensions 23 at their rear ends, as illustrated in Figures 7 and 8, in which event leaf springs 24, clips 25 and a wire member 26 corresponding to the parts E, 7 and F respectively may also be used, or the arms 27, 28, 29 and 30 respectively of the wire members 31 and 32 may be extended as illustrated in Figure '7 to provide edges at opposite sides as well as at opposite ends of the structure. 118

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What I claim as my invention is:

1. A spring structure having a base, two rows of upright substantially c-shaped leaf springs on the base, tie members above and bridging the space between said rows, said tie members being arranged in pairs, one pair of tie members being secured to each C-shaped spring, a transversely extending wire member in advance of said tie members, and connections between said wire member and tie members comprising leaf springs and clips, the leaf springs being substantially equal in width to the width of the C -shaped springs and being intermediate the clips and tiermembers, one pair of tie members being secured to each leaf spring, the clips being terminally connected to said wire member and leaf springs, one clip to each leaf spring. a

2. A spring structure having a base, two rows of upright substantially c-shaped leaf springs on the base, substantially horizontally disposed longitudinally curved leaf springs in advance of the front row of said C-shaped springs, tie members bridging the space between said rows and secured to said C-shaped springs and to said leaf springs, said tie members being arranged in pairs, one pair of said tie members being secured to each C-shaped spring and to each leaf spring, a transversely extending wire member in advance of said last mentioned leaf springs, and

clips securing the last mentioned leaf springs to said wire member, the over-all number of clips being approximately one-half the total number of tie members.

3. A'spring structure having a base, vertically disposed leaf springs on the base, tie members secured to said springs, and means for reinforcing said tie members including a band of relatively flexible material having end and intermediate sections arranged in overlapping relation, the end sections being fastened by headed elements to the tie members at opposite sides of the structure, and the intermediate section being fastened to the intermediate tie members by clips.

4. A spring structure having a base, two rows of upright substantially c-shaped leaf springs on the base, tie members'above and bridging the space between said rows, said tie members being arranged in pairs, one pair of tie members being secured to each c-shaped spring, each of said tie members being provided in advance of the front row of C-shaped springs with short forward extensions, a transversely extending wire member in advance of said extensions, and means for yieldably supporting said wire member including leaf springs and clips, the leaf springs being substantially equal in width to the width of the C-shaped' springs and being intermediate the clips and extensions, one leaf spring being secured to two extensions, the clips being terminally connected to said wire member and leaf springs one clip to each leaf spring.

5. A spring structure having a base, two rows of upright substantially C-shaped leaf springs on the base, tie members above and bridging the space between said rows, said tie members being provided in advance of the front row with short extensions, a transversely extending wire member in advance of said extensions and provided at opposite sides of the structure with rearwardly extending arms, and means for supporting said wire member and arms from said tie members including longitudinally curved leaf springs projecting forwardly from said extensions, one leaf spring to two extensions, clips projecting forwardly from said longitudinally curved leaf springs to said wire member, one clip to each leaf spring, and clips connecting said rearwardly extending arms to the tie members at opposite sides of the spring structure.

6. A spring structure having a base, two rows of upright substantially c-shaped leaf springs on said base, a transversely extending wire border member substantially parallel to one row of cshaped springs, tie members bridging the space between said rows and having relatively short extensions projecting toward and terminating short of the wire border member aforesaid, and supporting means for said wire border member including leaf springs secured to and projecting endwise from said extensions, one leaf spring to two extensions, and clips terminally secured to said last-mentioned leaf springs and wire border member, one clip to each leaf spring.

'7. A spring structure having a base, two rows of, upright substantially C-shaped leaf springs on said base, a transversely extending wire border member substantially parallel to one row ofc-shaped springs and having arms projecting therefrom at opposite sides of the spring structure, tie members bridging the space between said rows and having relatively short extensions projecting toward and terminating short of the wire border member aforesaid, and supporting means for the wire border member including leaf springs secured to and projecting endwise from said extensions, clips terminally secured to said last mentioned leaf springs and wire border member, and clips terminally connected to said arms and to the tie members at opposite sides of the spring structure.

EDWARD W. SCHLAPPRITZI. 

